Electrical Idle

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

Document ID
UG1085
Release Date
2022-09-15
Revision
2.3 English

There are two different kinds of electrical idle: one during sub-low power mode, and another during high-speed low-latency mode. During high-speed mode, the predriver controller controls the driver to short the lines (TXP and TXN) where they instantly change to the common-mode voltage specified by the protocols. In sub-low power mode, a low-power circuit holds the line. The power-consuming driver is in shut-off mode during the electrical idle.